Weld Root Crack Detection in Metal Plates Using Nonlinear Higher-Order Lamb Waves in Lame Mode

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門（英文）

発行日: 2024/11/01

タイトル(英語): Weld Root Crack Detection in Metal Plates Using Nonlinear Higher-Order Lamb Waves in Lame Mode

著者名: Makoto Fukuda (Akita University), Morimasa Nishihira (Akita University)

著者名(英語): Makoto Fukuda (Akita University), Morimasa Nishihira (Akita University)

キーワード: second harmonic ultrasonic wave，Lamb waves，Lame mode，weld root crack

要約(英語): This paper proposes a method for weld root crack detection in metal plates using nonlinear ultrasonic methods. Second harmonic components of Lamb waves are generated during propagation, which makes it difficult to distinguish them from second harmonic components generated by the nonlinear vibrations of cracks. Therefore, the Lame mode is employed to suppress unnecessary second harmonic components. Additionally, higher-order modes, which are more likely to be generated than the fundamental modes, are selected. In the case of higher-order Lame mode Lamb waves, the second harmonic amplitude in the defect area is suppressed by approximately 10dB compared with conventional S0 and A0 mode Lamb waves.

本誌: IEEJ Journal of Industry Applications Vol.13 No.6 （2024）

本誌掲載ページ: 741-742 p

原稿種別: 研究開発レター／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/13/6/13_L24000216/_article/-char/ja/